Apparatus for the enlarging of rings



March 13, 1928. 1,662,631

F. BLOIS APPARATUS FOR THE ENLARGING OF RINGS Filed July 21, 1925 2Shoots-450st -1 March13, 1928. 1 1,662,631

r F. BLOIS APPARATUS FOR THE ENLARGING 0F RINGS Filed July 21. 1925 2Shuts-Sheet 2 K M Iz'fhz y 'vr (Bah-5v 3 @SZc 1. Y I 1,

Patented Mar. 13, 1928.

FELIX BLOIS, OF PARIS, FRANCE.

APPARATUS FOR ENLABGILIG OF RINGS.

Application filed July 21, 1925, Serial No. 44,972, and in France August14', 1924.

My invention relates to a hand operated The essential parts of the toolare thebase 1, the lever 2, the handle 3 and a pair of rollers 4 and 5.In the base 1 is mounted the axle 6 which is secured in position bymeans of its screwthreaded portion 8 and the nut 9.

Upon the said axle are keyed the smooth roller 4: and the pinion 10. Thelever 2 is rotatable on the axle 6, it being held in place by thecollar11 of the latter. In said lever is mounted the forked holder 12 which isslidable, without rotation, in a squarerecess and the cylindrical recess14 of the said lever. On the latter is also mounted the handle 3 whichis screwed therein with easy friction.

lVithin the said handle is fitted the cylindrical portion 15 of the fork12, and the handle can rotate about portion 15 but is secured thereto asregards lengthwise motion, by means of the shanks 16 and 16 and the setscrew 17 The square portion 13 of fork 12 receives the removable roller5 as well as the pinion 18 secured thereto, and also the spindle 19which serves as a shaft for their rotation. The roller 5, which issuitably grooved, is therefore interchangeable.

The operation is as follows:

The annular portion of the ring inserted between the separated rollers 4and 5, so as to it upon the smooth roller 4, the smooth inner portion ofthe ring thus being in contact with roller 1.

Now the handle 3 is screwed into the lever 2, thus advancing the fork 12and its roller 5 toward roller 4; until the necessary pressure upon thering is obtained and thereupon the lever 2 and the handle 3 are rotatedabout the axle 6.

Due to this rotation, the roller 5 is caused to which handle 0 to rotateon its axis through the medium of the meshingpinions 10 and 18 after themanner of a'planetary pinion, since the stationary pinion 10 will rotatethe pinion 18 in mesh therewith. The roller 5 will thus roll upon thering, and due to the. pressure upon the handle 3, will exert a rollingor laminating action upon the metal of the ring, and in variable degreedepending uponthe desired enlargement of the ring.

In order to determine the amount of enlargement which depends upon theextent is screwed inwards, I

provide upon said handle a smooth graduated portion 20 (Fig. 2) adaptedto enter the socket in lever 2; upon the edge of the latter is providedan indicating line 2100- operating wtih said graduations.

While base 1 may be mounted upon a wall, I prefer to secure it upon atable, in which position, the operations upon the ring may be closelyobserved. The disposition of the rollers permits the rings to be rapidlyinserted and removed without the necessity of dismounting any part ofthe apparatus. The grooved roller is removable and therefore, a rollersuitable to the shape of the ring may be used. It should also be notedthat the tool can be operated by one hand and by means of a single part,i. e. the handle.

Obviously the tool is susceptible of various modifications, and theseveral elements thereof may be replaced by others serving a likepurpose or producing the same eifect.

I claim:

In an apparatus for enlarging rings, a

base, an axle, a ring supporting roller fixed on said axle, a handlerotatably secured on said axle, a roller support longitudinally movablein said handle, a spindle in said roller support, a grooved rollerrotatably mounted on said spindle, inter-meshing pinions associated withsaid ring supporting roller andsaid grooved roller to cause rotation ofsaid grooved roller on movement of said handle about said axis, andmeans comprising rotation of the handle about its axis to move saidsupport for adjustably positioning said grooved roller in relation tosaid ring supporting roller.

In testimony whereof he has afiixed his signature.

FELIX, BLOIS.

